Scala | Product3

Last Updated : 13 May, 2019

Product3 is a trait in Scala, which is a Cartesian product of three elements. The Linear Supertypes here are Product, Equals, and Any and the known subclass here is Tuple3. It extends the trait Product i.e,

trait Product3[+T1, +T2, +T3] extends Product

Where, T1, T2, and T3 are the used parameter types of the Scala.

Abstract Value Members
The abstract value members here are:

```
abstract def _1: T1
```
It returns the elements of the first parameter type.
```
abstract def _2: T2
```
It returns the elements of the second parameter type.
```
abstract def _3: T3
```
It returns the elements of the third parameter type.
```
abstract def canEqual(that: Any): Boolean
```
It returns true if two instances are equal else returns false.

Example :

// Scala program of a trait 
// Product3 
  
// Creating an object 
object GfG 
{ 
  
    // Main method 
    def main(args: Array[String])  
    { 
      
        // Applying Produt3 trait 
        // and assigning values 
        val x: Product3[String, Int, Double] =
        { 
            ("GeeksforGeeks", 32, 43) 
        } 
        // Displays the first element 
        println(x._1) 
      
        // Displays the second element 
        println(x._2) 
      
        // Displays the third element 
        println(x._3) 
              
    } 
} 

Output:

GeeksforGeeks
32
43.0

Here, we have utilized abstract value members for accessing the elements.

Concrete Value Members
The concrete value members here are:

```
def productArity: Int
```
It returns the number of parameters in Product3 trait.
```
def productElement(n: Int): Any
```
It returns nth element.
```
def productIterator: Iterator[Any]
```
It returns an iterator by default.
```
def productPrefix: String
```
It returns the empty string by default.

Example :

// Scala program of a trait 
// Product3 for concrete  
// value members 
  
// Creating an object 
object GfG 
{ 
  
    // Main method 
    def main(args: Array[String])  
    { 
      
        // Applying Product3 trait 
        // and assigning values 
        val x: Product3[String, Char, Int] =
        { 
            ("GeeksforGeeks", 'a', 43) 
        } 
          
        // Displays number of elements 
        println(x.productArity) 
      
        // Displays nth element 
        println(x.productElement(1)) 
      
        // Displays prefix of the trait 
        println(x.productPrefix) 
              
    } 
} 